已知函数y=ax2+bx+c的图象如图所示,那么关于x的方程ax2+bx+c+1=0的根的情况是( )
A:无实数根
B:有两个相等实数根
C:有两个异号实数根
D:有两个同号不等实数根
计算4﹣(﹣6)的结果为____
You should return the book____the library on time.
The baby has made such a terrible____(凌乱)in her room.